Pincher-shaped extrusion stitching nail type meniscus front-rear corner stitching instrument

Abstract

The invention discloses a pincher-shaped extrusion stitching nail type meniscus front-rear corner stitching instrument, relating to a meniscus front-rear corner stitching apparatus which can be used for tissue stitching in narrow gaps, and belonging to the field of medical apparatuses. The stitching instrument is pincher-shaped; an extrusion stem with a spring is connected on the inner side of a handle; a closed piston is arranged at the top end of the extrusion stem and is positioned in a three-way type hydraulic tube; and the three-way type hydraulic tube is a closed device which is fully filled with a working medium. A push rod with a piston is arranged at the other outlet of the three-way type hydraulic tube and passes through a center pivot, and a stitching nail fixing plate is arranged at the top end of the push rod and can be used for fixing staple-shaped meniscus stitching nails. The tips of pincher mouths are oppositely bent for 90 degrees to form a baffle plate, and are provided with stitching nail guide grooves. The handle pressure of the pincher-shaped extrusion stitching nail type meniscus front-rear corner stitching instrument is transferred through hydraulic pressure to drive the push rod to move forwards so as to push and squeeze a meniscus stitching nail to the baffle plate, and then the meniscus stitching nail is bent along the guide grooves, so that the aim of stitching a meniscus split is achieved.

Description

technical field [0001] The invention relates to a suturing instrument for the anterior and posterior corners of the meniscus, in particular to a minimally invasive suturing surgical instrument for the anterior and posterior corners of the meniscus with squeezed nails and belongs to the field of medical instruments. Background technique [0002] The meniscus is a layer of fibrocartilage located between the femur and tibia of the knee joint. It is a necessary structure of the knee joint and plays an important role in maintaining joint function. Meniscus injuries are mostly caused by torsional external force, resulting in meniscus tear, which can occur in the anterior horn, posterior horn and body of the meniscus. Due to the poor blood supply of the meniscus, it is not easy to heal itself after the injury. At the same time, the torn meniscus will damage other structures of the knee joint and cause traumatic arthritis. Therefore, the meniscus injury with a clear diagnosis should...

AI Technical Summary

Problems solved by technology

However, at present, the effect of meniscus suture, especially meniscus anterior and posterior corner suture, is not satisfactory. The reason is mainly related to the operation method determined by the surgical instrument, in addition to the patient's own factors, such as the meniscal suture instrument ( ZL96219212)

At present, the suture of the anterior and posterior corners of the meniscus mostly adopts the suture type meniscus suture instrument, which is operated under the cooperation of arthroscopy. The disadvantage is that it needs to be threaded and knotted multiple times on the meniscus during the operation, which is easy to cause secondary damage to the meniscus; There are too many operating procedures in the joint cavity under direct vision, which increases the difficulty of the operation; the operation process of the instruments is complicated, and it is difficult for young doctors to master, and the learning time is long; the operation time is long, which increases the probability of surgical complications such as infection; postoperative sutures Easy to slip off, meniscus is not easy to heal

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